Cutting tool



April 4, 1950 G. w. MURPHY Erm..

CUTTING TOOL Filed March 22, 1946 2 o. 9 t A .J 2 (A v4?. 4 y, JF m. 7...A 7 a f if M M7 M f/f ff. i 2 w Patented Apr. 4, 11,950

CUTTING rrooLv` -Gene W. Murphy and Samuel I. Kelley, St. Lawrence, S.Dak.

Application March 22, 1946, Serial No. 656,455

1 Claim.

This invention relates to a cutting tool, and more particularly to sucha device adapted to cut bar stock, such as iron, mild steel, or similarmaterial.

A primary object of this invention is the provision of an improvedcutting device comprised of a pair of oppositely positioned,substantially identical members adapted to cut bar stock by a torsionalmovement of the two opposed members.

An additional object of the invention is the provision of such a devicewhich may be readily utilized by a single individual, in order to cutsuch stock efficiently and rapidly.

A still further object of the invention is the provision of a devicewhich may be readily utilized in constricted spaces and in locationswhich present difficulty to the insertion of more cumbersome cuttingtools.

Still another 'object of the invention is the provision of such a devicewhich is sturdy and durable in construction, reliable and elicient in0peration, and relatively simple and inexpensive to manufacture,assemble, and utilize.

Other objects Will in part be obvious and in part be pointed out as thedescription of the invention proceeds, and shown in the accompanyingdrawings, wherein there is disclosed a preferred embodiment oi thisinventive concept.

In the drawings:

Figure 1 is a front plan view of one of the elements comprising afeature of the instant invention, partially broken away.

Figure 2 is a view taken substantially at right angles to Figure 1.

Figure 3 is an enlarged fragmentary view showing two of the memberscomprising the cutting device in cutting association with a bar ofstock, as viewed from the front, or end of the stock.

Figure 4 is a View taken substantially at right angles to Figure 3,certain concealed portions of the apparatus being indicated in dottedlines.

Similar referencecharacters refer to similar parts throughout theseveral views of the drawll'lgS.

Having reference now to the drawings, the cutting device of the instantinvention comprises a pair of substantially identical members, one ofwhich is indicated at II! in Figures l and 2. Each of the members II)includes a shank portion II having beveled shoulder portions I2 merginginto an extending handle or shaft I3, which may, if desired, terminatein a chisel point I II. The lower extremity of each member I0 is formedto prodisc-like cutting member I5 comprised of high carbon steel. Theshank may, if desired, be comprised of mild steel or the like. Themember I6 is secured to the shank I0, as by welding II, or the like. Aslot I8 is cut or formed in the disc portion I5 and the member I6 anddiverges from the cutting member I6 towards the portion I5 of the shankand therethrough, as indicated at I9, to form a pair of opposed cuttingedges 20. The rear surface of each of slots I8 is lleted, as at ZI, toform round corners.

- In the use and operation of the device, the two members It arepositioned, as best shown in Figures 3 and ll, with the cutting membersI6 in face-to-iace abutting relation with the stock 22 to be cutreceived in each of the slots I8. The

slots are oppositely disposed and the sh'anks I3 extend radially inface-to-face but slightly spaced relation. If the shanks I3 are nowforced in opposite directions, a torsional movement is imparted to thecutting edges 20 formed by the slots I8 in the high carbon steel membersI6, the inner edges of which cut the steel, starting at the four opposedcorners thereof, and extending inwardly as the torque increases, untilthe bar stock 22 is snapped at the substantial center of the cut.

Obviously, the slots I8 may be made in any desired size to accommodateany desired size of stock, and a variety of sizes of stock may beaccommodated in a single sized slot.

From the foregoing it will now be seen that there is herein provided Ianimproved cutting device which accomplishes all the objects of thisinvention, and others, including many advantages of great practicalutility and commercial importance.

As many embodiments may be made of this inventive concept, and as manymodifications may be made in the embodiment hereinbefore shown and setforth, it is to be understood that all matter herein is to beinterpreted merely as illustrative,

and not in a limiting sense.

We claim:

In a cutting device, a pair of shank members, each of said shank membershaving an extremity formed with a slot therein, a high carbon steel discrigidly secured to each extremity, each disc being formed with a cuttingslot therein aligned with said rst-mentioned slot, said discs beingadapted to be positioned oppositely about a bar of stock to be cut withsaid discs in face-to-face abutting relation and with said slotsoppositely disposed and receiving said stock therein, and said membersbeing adapted to be rotated in opposite direcvide a disc portion I5 andhas aXod thereto a 5.5 nous to shear said bar, and said discs providing2,502,582 3 4 arcuate edges engageable with a supporting sur- FOREIGNPATENTS face and providing fulcrums.

GENE W MURPHY. Number Country Date SAMUEL I. KELLEY. 1,283,917 GermanyNov. 5, 1918 5 REFERENCES CITED OTHE-R RFRENCES The following referencesare of record in the edMfBa'mcal Engmeers Handbook Marks 3rd le of thispatent:

MoGnewgHlll, page 555, page 17716. S'IAWTES lo Number Name Date 146,846Stevens Jan. 27, 187,4

1,588,982 Norton June 15, 19;21@

